Thanks, I am 99,9% sure that I know what is the problem. It seems like you are using French as language in ZoneMinder? I have heard about similar problems with German, but I thought had solved those language related problems. I will have to check up when I come home. I bet everything works if you switch to english in ZoneMinder. Off course French should also work

On the ZoneMinder dashboard, you have information about your monitor, One column says event, if it says 0 then there is zero events and you have found a potential reason.Click on the name of the monitor and in the detailed screen, you should click "Force Alarm" (remember to cancel again )

I think you're right but it seems i had a zoneminder issue in this case because i just added another monitor with a video stream and still at 0 events ,my zone is ok , btw when i click on force alarm it should be online shouldn't it?

edit : i find out , now i have events ,i give you answer as soon as the bridge come online !

I have identified a problem in the code, I think the problem that I have identified has "many faces", I have verified that it specifically occurs when starting adding a monitor without any events. I have reason to believe that it also can occur in other situations. A precondition for the problem is that the monitor is OFFLINE in openHAB, there might be more. I believe that it could also solve the variant that you are looking at.